A vehicle built on a chassis and having a body of not more than 8-feet wide and 32-feet long designed for travel, recreation, and vacation use is a ___________.

The description given refers to a type of recreational vehicle specifically designed for travel and vacation purposes, which aligns perfectly with the definition of a travel trailer. Travel trailers are towed by a separate vehicle and are constructed to be lightweight, portable, and easily transportable, meeting the specified dimensions of not more than 8 feet wide and 32 feet long. They provide amenities similar to those found in a home, such as sleeping areas, kitchen facilities, and bathrooms, making them ideal for recreational use.

In contrast, motorhomes are self-propelled vehicles designed for the same purpose, but they do not fit the definition provided since they are built on a chassis with built-in living accommodations. Fifth-wheels are a type of travel trailer that attaches to a pickup truck with a special hitch, which again distinguishes them from standard travel trailers. Cargo trailers are primarily used for transporting goods and lack the residential features associated with recreational vehicles. Hence, the answer accurately reflects the characteristics outlined in the question.